nsresult RegisterBluetoothEventHandler(const nsCString& aNodeName, BluetoothEventObserver* aHandler) { MOZ_ASSERT(NS_IsMainThread()); BluetoothEventObserverList *ol; NS_ENSURE_TRUE(sBluetoothEventObserverTable, NS_ERROR_FAILURE); if (!sBluetoothEventObserverTable->Get(aNodeName, &ol)) { sBluetoothEventObserverTable->Put(aNodeName, new BluetoothEventObserverList()); } sBluetoothEventObserverTable->Get(aNodeName, &ol); ol->AddObserver(aHandler); return NS_OK; }
bool WaveReader::LoadListChunk(uint32_t aChunkSize, nsAutoPtr<dom::HTMLMediaElement::MetadataTags> &aTags) { // List chunks are always word (two byte) aligned. MOZ_ASSERT(mDecoder->GetResource()->Tell() % 2 == 0, "LoadListChunk called with unaligned resource"); static const unsigned int MAX_CHUNK_SIZE = 1 << 16; static_assert(uint64_t(MAX_CHUNK_SIZE) < UINT_MAX / sizeof(char), "MAX_CHUNK_SIZE too large for enumerator."); if (aChunkSize > MAX_CHUNK_SIZE || aChunkSize < 4) { return false; } nsAutoArrayPtr<char> chunk(new char[aChunkSize]); if (!ReadAll(chunk.get(), aChunkSize)) { return false; } static const uint32_t INFO_LIST_MAGIC = 0x494e464f; const char* p = chunk.get(); if (ReadUint32BE(&p) != INFO_LIST_MAGIC) { return false; } const waveIdToName ID_TO_NAME[] = { { 0x49415254, NS_LITERAL_CSTRING("artist") }, // IART { 0x49434d54, NS_LITERAL_CSTRING("comments") }, // ICMT { 0x49474e52, NS_LITERAL_CSTRING("genre") }, // IGNR { 0x494e414d, NS_LITERAL_CSTRING("name") }, // INAM }; const char* const end = chunk.get() + aChunkSize; aTags = new dom::HTMLMediaElement::MetadataTags; while (p + 8 < end) { uint32_t id = ReadUint32BE(&p); // Uppercase tag id, inspired by GStreamer's Wave parser. id &= 0xDFDFDFDF; uint32_t length = ReadUint32LE(&p); // Subchunk shall not exceed parent chunk. if (uint32_t(end - p) < length) { break; } // Wrap the string, adjusting length to account for optional // null termination in the chunk. nsCString val(p, length); if (length > 0 && val[length - 1] == '\0') { val.SetLength(length - 1); } // Chunks in List::INFO are always word (two byte) aligned. So round up if // necessary. length += length % 2; p += length; if (!IsUTF8(val)) { continue; } for (size_t i = 0; i < mozilla::ArrayLength(ID_TO_NAME); ++i) { if (id == ID_TO_NAME[i].id) { aTags->Put(ID_TO_NAME[i].name, val); break; } } } return true; }